Measurement of the cosmic-ray muon spectrum and charge ratio at large zenith angles in the momentum range 100 GeV/cto 10 TeV/cusing a magnet spectrometer

Abstract
The cosmic-ray muon momentum spectrum and charge ratio up to momenta ≃ 10 TeV/c have been measured with high accuracy. The power index of the differential spectrum of parent mesons at production gradually increases with momentum and becomes 2.84±0.03 in the momentum range 0.8 to 10 TeV/c. The charge ratio is almost constant at a value of 1.27±0.02 from 0.1 to 10 TeV/c.